POSITION TRACKING OF PASSIVE RESONANCE-BASED TRANSPONDERS
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United States of America Patent
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Issued Date -
Nov 15, 2007
app pub date -
May 12, 2006
filing date -
May 12, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system for position tracking includes one or more field generators, which are arranged to generate one or more respective position-varying magnetic fields. A transponder includes a resonant circuit having a resonance frequency and including a field-responsive element, which is operative to vary the resonance frequency responsively to the one or more magnetic fields. A position tracker is arranged to remotely sense the resonance frequency of the resonant circuit and to determine a position of the transponder responsively to the sensed resonance frequency.
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